用 vs 和 gcc 编译结果不一样怎么办

今天写一个词法分析器，在 vs 下 debug 后生成运行好好的，转到 Ubuntu 用 gcc 编译一下子傻眼了，回 win 下面用 gcc 编译也是一样的结果
这是 vs 的结果（正常）： http://chuantu.biz/t6/82/1507355708x3738353725.png
这是 gcc 的结果（无限循环）： http://chuantu.biz/t6/82/1507355765x2890174166.png
初学者，实在搞不懂为什么
这是代码
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<ctype.h>

int charClass;
#define MAX_LEN 3000
char lexeme[MAX_LEN];
char nextChar;
char next2Char;
int lexLen;
int token;
int nextToken;
FILE* inFile;

#define LETTER 0
#define DIGIT 1
#define SLASH 2
#define ASTERISK 3
#define DQUOTE 4
#define UNKNOWN 999

enum {ABSTRACT =258,    CASE,        CATCH,       CLASS,       DEF,
DO,          ELSE,        EXTENDS,     fALSE,       FINAL,
FINALLY,     FOR,         FORSOME,     IF,          IMPLICIT,
IMPORT,      LAZY,        MACRO,       MATCH,       NEW,
nULL,        OBJECT,      OVERRIDE,    PACKAGE,     PRIVATE,
PROTECTED,   RETURN,      SEALED,      SUPER,       THIS,
THROW,       TRAIT,       TRY,         tRUE,        TYPE,
VAL,         VAR,         WHILE,       WITH,        YIELD,
UNDERLINE,    COLON,    EQU,    EQUG,    LDE,    LCO,    LPER,     GCO,    HASHTAG,    AITE,
OPERATOR,     ID,       INTERGER,		ERROR,     SYMBOL,       COMMENT,      STRING};

char* keywords[]={"abstract",    "case",        "catch",       "class",       "def",
"do",          "else",        "extends",     "false",       "final",
"finally",     "for",         "forSome",     "if",          "implicit",
"import",      "lazy",        "macro",       "match",       "new",
"null",        "object",      "override",    "package",     "private",
"protected",   "return",      "sealed",      "super",       "this",
"throw",       "trait",       "try",         "true",        "type",
"val",         "var",         "while",       "with",        "yield",
"_",    ":",    "=",    "=>",    "<-",    "<:",    "<%",     ">:",    "#",    "@",	0};

void addChar()
{
  if(lexLen <= MAX_LEN -2)
  {
      lexeme[lexLen++] = nextChar;
      lexeme[lexLen] = 0;
  }
  else
      printf("ERROR:lexeme is too long. \n" );
}

void getChar()
{
    static int firstRun = 1;
    if(firstRun)
    {
        nextChar = getc(inFile);
        next2Char = getc(inFile);
        firstRun = 0;
    }
    else
    {
        nextChar = next2Char;
        next2Char = getc(inFile);

    }

    if(nextChar == EOF)
    {
        charClass = EOF;
    }
    else
    {
      if (nextChar == '\"')
        charClass = DQUOTE;
      else if(nextChar == '/')
        charClass = SLASH;
      else if(nextChar == '*')
        charClass = ASTERISK;

      else if(isalpha(nextChar))
        charClass = LETTER;
      else if(isdigit(nextChar))
        charClass = DIGIT;
      else
        charClass = UNKNOWN;
    }
}

void getNonBlank()
{
    while (isspace(nextChar)) {
      getChar();
    }
}

int checkSymbol(char ch,char nextCh)
{
    switch (ch) {
	case '(':case ')':case '{':case '}':case '<':case '>':case'&':case '[': case ']':case '.':case '\\':case '_':case '=':case ':':case ';':
        addChar();
        nextToken = SYMBOL;
        break;
      case '+':case '-':case '*':case '/':
        addChar();
        nextToken = OPERATOR;
        break;
      case EOF:
        addChar();
        nextToken = EOF;
      default:
        printf("ERROR:unknown character '%c'. \n",ch );
        nextToken = ERROR;
    }
    return nextToken;
}

void checkKeywords(char* pword)
{
    int i = 0;
    while(keywords[i]!= 0)
    {
        char* pkeyword=keywords[i];
        if(strcmp(pword,pkeyword) == 0)
        {
            nextToken = 258 + i;
            return;
        }
        i++;
    }
}

int lexer()
{
    lexLen =0;
    getNonBlank();
    switch (charClass) {
      case DQUOTE:
        addChar();
        getChar();
        while(charClass != DQUOTE)
        {
            addChar();
            getChar();
        }
        addChar();
        getChar();
        nextToken = STRING;
        break;
      case SLASH:
        addChar();
        getChar();
        if(charClass == ASTERISK)
        {
            addChar();
            getChar();
            loop:
            while(charClass != ASTERISK)
            {
                addChar();
                getChar();
            }
            addChar();
            getChar();
            if(charClass == SLASH)
            {
                addChar();
                getChar();
                nextToken = COMMENT;
                break;
            }
            else goto loop;
        }
        else if(charClass == SLASH)
        {
            addChar();
            getChar();
            while(nextChar != '\n')
            {
                addChar();
                getChar();
            }
            nextToken = COMMENT;
            break;
        }
        else
        {
           nextToken = OPERATOR;
           break;
        }
      case ASTERISK:
        nextToken = OPERATOR;
        break;
      case LETTER:
        addChar();
        getChar();

        while(charClass == LETTER || charClass == DIGIT)
        {
            addChar();
            getChar();
        }
        nextToken = ID;

        checkKeywords(lexeme);
        break;
      case DIGIT:
        addChar();
        getChar();
        while(charClass == DIGIT)
        {
            addChar();
            getChar();

        }
        nextToken = INTERGER;
        break;

      case UNKNOWN:
          checkSymbol(nextChar,next2Char);
          getChar();
          break;
      case EOF:
          nextToken = EOF;
          lexeme[0] = 'E';
          lexeme[1] = 'O';
          lexeme[2] = 'F';
          lexeme[3] = 0;
          break;
    }

    printf("<%6d,   %s  >\n",nextToken,lexeme);
    return nextToken;
    memset(lexeme,0,sizeof(lexeme));
  }

  int main(int argc,char* argv[])
  {
    argv++;argc--;
    inFile = fopen(argv[0],"r");
    if(inFile == NULL)
    {
      printf("ERROR:cannot open file.\n" );
      exit(0);
    }

    getChar();
    while(nextToken != EOF)
      lexer();

    return 0;
  }